FC Seoul

Founding and early years (1983–1989)

FC Seoul held an official founding ceremony on December 22, 1983, following the official announcement of its founding in August of that year. The club was initially named Lucky-Goldstar Hwangso Football Club. Owned and financially supported by the Lucky-Goldstar Group, it became the fifth professional football team in South Korea. The founding hometown was assigned to Chungcheong Province, and its mascot became a bull.

To establish a professional football club, the Lucky-Goldstar Group had a preparatory period since 1982 and requested that the franchise be located in Seoul. In the 1984 season, the club finished seventh out of eight clubs. It fared better in the 1985 season, winning the league title with the help of Thai international Piyapong Pue-on, who was the league's top scorer as well as the top assist provider.

Moving to Seoul and then to Anyang (1990–2003)

From the beginning of 1988, Lucky-Goldstar Hwangso pushed forward a relocation to Seoul. At the end of the 1989 season, the Korea Professional Football League (renamed as the K League in 1998), worried about the financial stability of the clubs, invited a number of clubs to play in Seoul. Thus, the Lucky-Goldstar Hwangso, which had always wanted to be based in the capital, moved to Seoul Stadium (currently Dongdaemun Stadium) in Seoul at the end of 1989.

The club finished its first season in Seoul as champions. The club changed its name to LG Cheetahs in 1991 to mirror the LG Twins, a professional baseball team also owned by LG Group. After several seasons in Seoul, the club was forced to move in 1996, as part of the K League's decentralization policy. This policy was carried out to stimulate the growth of football in the provinces. In addition, in 1995, Korea was bidding to host the 2002 FIFA World Cup. This warranted the construction of a soccer-specific stadium in Seoul. The three clubs based in Seoul – LG Cheetahs, Ilhwa Chunma, and Yukong Elephants did not want to recognize the decentralization policy. Ultimately, it proved necessary for the Korean government to issue an eviction order to the disaffected clubs. However, the government did guarantee if the clubs built a soccer-specific stadium in Seoul, the clubs could have a Seoul franchise and return to Seoul.

As a result, 3 clubs were evicted from Seoul to other cities. This entailed the move of the LG Cheetahs to the Anyang Sports Complex in the city of Anyang, a satellite city of Seoul, 21 km away. The club was now known as the Anyang LG Cheetahs. In the upcoming years, a solid base of supporters was formed, and it established a strong league rivalry with the Suwon Samsung Bluewings. This rivalry was partly fueled by the fact that LG Group and Samsung Group, which owned the Suwon club, were also considered rivals in the business world, especially in electronics. The club continued to grow and in 2000, they won their third Championship, behind the firepower of striker Choi Yong-Soo.

Return to Seoul and renaming to FC Seoul (2004–2006)

For the 2002 FIFA World Cup in South Korea and Japan, ten brand new stadiums of World Cup standards were built in South Korea. After the World Cup, the Korean World Cup Organizing Committee and the KFA actively supported the move of regional K League clubs into the new stadia. This was designed to avoid or at least minimize any financial losses through having to maintain a stadium in playing condition without regular income. However, due to the previous decision by the K League to exclude any member club from being based in Seoul, Seoul World Cup Stadium remained vacant, except as a host of some international friendlies. Thus, the city government of Seoul and the KFA both actively sought for a K League club to play at the stadium to take on the cost of maintaining the stadium. Initially, it was intended to create a new club, but when it later transpired that any club playing in Seoul World Cup Stadium would have to pay partially for the construction fees of the stadium, this would have placed an unreasonable burden on a fledgling club. Thus, the KFA tried to lure one of the current clubs to Seoul. The Anyang LG Cheetahs, with the financial backing of the LG Group, who not only viewed the move back to Seoul as a way to increase its advertising presence, but had the right to come back to Seoul because it had its franchise moved by force in 1996, as part of the K League's decentralization policy. Anyang LG announced in February 2004 that it would pay the share of the construction fees (which turned out to be 15 billion won, or at that time US$15 million). This proposed move provoked a significant amount of controversy from the Korean football fans as KFA and K League failed to launch a new football club based in Seoul due to a high Seoul franchise fee. Regardless, KFA and K League ultimately permitted relocation of Anyang LG Cheetahs.

Şenol Güneş years (2007–2009)

Şenol Güneş managed FC Seoul for a three-year period starting on December 8, 2006. The club started the 2007 season with three consecutive wins and a draw, including a 4–1 win over arch rivals Suwon Samsung Bluewings in the Super Match. However, FC Seoul failed to qualify for the play-off phase of the season, but the club succeeded in getting into the final of the 2007 Korean League Cup. Before the next season, Park Chu-young, the ace of FC Seoul at that time, was transferred to Ligue 1 club Monaco. FC Seoul finished in a second-place in the K League regular season, and progressed to the play-offs. FC Seoul defeated Ulsan Hyundai in the play-off semi-final but was defeated by Suwon Samsung Bluewings in the final. Despite the loss, the club still qualified for the 2009 AFC Champions League. During the season, Dejan Damjanović scored 15 goals.